Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Night vision views of Orion from a light polluted garden

NV
  • Please log in to reply
19 replies to this topic

#1 Gavster

Gavster

    Viking 1

  • -----
  • topic starter
  • Posts: 673
  • Joined: 07 Mar 2014

Posted 10 October 2019 - 03:25 AM

I’ve been looking forward to observing Orion again and this morning I woke up early and saw Orion beaming brightly in the South. I couldn’t resist taking a scope outside for a quick early look. I’ve had great success with a Tak fsq85 as a night vision grab and go scope so this was my choice today. Also, yesterday I’d received a Baader ultra short Tak clamp which increases the in focus and meant that I was able to get my 0.75x rc reducer and 41mm panoptic to focus (just by about 3mm!). I could immediately see that this setup gave much less astigmatism than using a 55mm plossl.

 

I wouldn’t normally post images of the views from my lp back garden in south west London, since the shots I’ve taken at dark sites are just so much better. But I thought I would today, just to give an indication of the quite pleasing views I got this morning. In particular, the sky background is pretty grey and there is definitely less fine detail but it was a lot of fun nevertheless.

 

Very much looking forward to some dark site observing of the Orion region soon.

 

All phone images are 20 second exposure with an iso of 50.

In order, Tak Fsq85, horsehead, rosette

 

Attached Thumbnails

  • FB37E788-6359-49AC-8A99-D70618695E30.jpeg
  • B9986FCE-74E0-4B4C-826B-2C5992961F1E.jpeg
  • DF476265-D682-47BA-A072-1A649FB72F48.jpeg

  • GeezerGazer, eros312, nicknacknock and 8 others like this

#2 Gavster

Gavster

    Viking 1

  • -----
  • topic starter
  • Posts: 673
  • Joined: 07 Mar 2014

Posted 10 October 2019 - 03:27 AM

And monkey head, jellyfish and lowers

 

Attached Thumbnails

  • F9704B41-840D-4B09-A57A-CEE86BC96B72.jpeg
  • 6FD54548-B844-49D0-AFAA-D4FAF2F40E50.jpeg
  • 71FC4CEE-B94C-4302-8578-4AA786ABB0C7.jpeg

  • Starman27, eros312, nicknacknock and 2 others like this

#3 Gavster

Gavster

    Viking 1

  • -----
  • topic starter
  • Posts: 673
  • Joined: 07 Mar 2014

Posted 10 October 2019 - 03:30 AM

And finally flaming star, and a horse head/flame/Orion combo

Attached Thumbnails

  • 7280F86E-121E-4011-B5F0-9D1F71C19723.jpeg
  • 41775F8B-0A6E-48D0-A452-14D8F39E2B56.jpeg

  • Jeff Morgan, Starman27, eros312 and 7 others like this

#4 bobhen

bobhen

    Gemini

  • *****
  • Posts: 3291
  • Joined: 25 Jun 2005

Posted 10 October 2019 - 07:31 AM

Wonderful images. These images also closely match my visual experience.

 

I have seen all of these nebulas visually with the Micro and 102 and 120mm refractors and with about the same level of detail as seen in your images and from the heavily light polluted Philadelphia suburbs. Even the dim patch of nebula Sh-2 247 that is below your image of the Monkey Head Nebula was observed visually, which really demonstrates the power of Night Vision.

 

Bob


  • Gavster likes this

#5 Mark Strollo

Mark Strollo

    Explorer 1

  • *****
  • Posts: 73
  • Joined: 20 Mar 2006
  • Loc: Waterford, CT

Posted 10 October 2019 - 10:07 AM

Pics look great.  Phone or camera?  Any filter?



#6 Gavster

Gavster

    Viking 1

  • -----
  • topic starter
  • Posts: 673
  • Joined: 07 Mar 2014

Posted 10 October 2019 - 10:20 AM

Pics look great.  Phone or camera?  Any filter?

I took this with a huawei p20 pro attached to the eyepiece with a Televue fonemate. I also used a ha filter.



#7 Jeff Morgan

Jeff Morgan

    Voyager 1

  • *****
  • Posts: 11002
  • Joined: 28 Sep 2003
  • Loc: Prescott, AZ

Posted 10 October 2019 - 10:20 AM

Nice shots!

 

During this waxing moon cycle I managed 5 sessions after moonset, each starting around 1AM.

 

I told my friends it's like super jet lag - five trips to Europe in the last ten days. But is so much nicer to see the winter stuff when it is 30-40 degrees warmer ...

 

Moonset is now pretty close to astronomical twilight. Ten days to rest up for astronomy at "normal" hours. grin.gif


  • Gavster likes this

#8 Mark Strollo

Mark Strollo

    Explorer 1

  • *****
  • Posts: 73
  • Joined: 20 Mar 2006
  • Loc: Waterford, CT

Posted 10 October 2019 - 11:10 AM

Thanks, Gavster and others.

Just got on the NV bus and researching Ha filters. Down to the Chroma 8nm or Baader 7nm.



#9 Gavster

Gavster

    Viking 1

  • -----
  • topic starter
  • Posts: 673
  • Joined: 07 Mar 2014

Posted 10 October 2019 - 11:17 AM

Thanks, Gavster and others.

Just got on the NV bus and researching Ha filters. Down to the Chroma 8nm or Baader 7nm.

My preference is for a tighter band than 7 or 8, preferably 5 or less.



#10 GOLGO13

GOLGO13

    Skylab

  • *****
  • Posts: 4287
  • Joined: 05 Nov 2005
  • Loc: West Virginia

Posted 10 October 2019 - 11:19 AM

My chroma 8nm is beating my 5nm astrodon so far. But ive only had one session with it.

#11 Gavster

Gavster

    Viking 1

  • -----
  • topic starter
  • Posts: 673
  • Joined: 07 Mar 2014

Posted 10 October 2019 - 11:31 AM

My chroma 8nm is beating my 5nm astrodon so far. But ive only had one session with it.

Interesting - what specifically was better about the 8nm compared to the 5 from your comparison?



#12 bobhen

bobhen

    Gemini

  • *****
  • Posts: 3291
  • Joined: 25 Jun 2005

Posted 10 October 2019 - 01:00 PM

Thanks, Gavster and others.

Just got on the NV bus and researching Ha filters. Down to the Chroma 8nm or Baader 7nm.

Had the Baader 7, purchased an Astronomik 6 and never used the 7 again.

 

I observe in heavy light pollution and found the 6 delivered easier to see nebulas (stood out better) with harder edges and easier to see details.

 

Bob



#13 GOLGO13

GOLGO13

    Skylab

  • *****
  • Posts: 4287
  • Joined: 05 Nov 2005
  • Loc: West Virginia

Posted 10 October 2019 - 01:18 PM

Interesting - what specifically was better about the 8nm compared to the 5 from your comparison?


Every thing I looked at was better. 1x, 50mm guide scope, 6 inch f4, .7 reduced. Could just be the way my unit works and what i was looking at. Summer nebulas. I'll do some further tests soon.

#14 Gavster

Gavster

    Viking 1

  • -----
  • topic starter
  • Posts: 673
  • Joined: 07 Mar 2014

Posted 10 October 2019 - 02:03 PM

Every thing I looked at was better. 1x, 50mm guide scope, 6 inch f4, .7 reduced. Could just be the way my unit works and what i was looking at. Summer nebulas. I'll do some further tests soon.

Like bobhen I find the narrower bandwidth ha filters make the nebulae pop out more and give more contrast particularly in lp areas. I adjust the gain to reduce the scintillation to a level I’m happy with (ie when I don’t notice it). But they do attenuate the stars more.



#15 GOLGO13

GOLGO13

    Skylab

  • *****
  • Posts: 4287
  • Joined: 05 Nov 2005
  • Loc: West Virginia

Posted 10 October 2019 - 02:22 PM

That's what I understand, but that's not what I have seen with these two filters in my unit. Not sure why. It was actually a bit dramatic at the higher magnifications. Maybe we'll have some clear skies tonight and I can try again. Wish I could take pictures, but have not gotten there yet.

 

My skies are fairly light polluted, but not extreme. On the cleardarksky app I'm in orange. which is less than white and red, but still not great.


Edited by GOLGO13, 10 October 2019 - 02:23 PM.


#16 Gavster

Gavster

    Viking 1

  • -----
  • topic starter
  • Posts: 673
  • Joined: 07 Mar 2014

Posted 10 October 2019 - 02:44 PM

That's what I understand, but that's not what I have seen with these two filters in my unit. Not sure why. It was actually a bit dramatic at the higher magnifications. Maybe we'll have some clear skies tonight and I can try again. Wish I could take pictures, but have not gotten there yet.

 

My skies are fairly light polluted, but not extreme. On the cleardarksky app I'm in orange. which is less than white and red, but still not great.

This makes me wonder if your astrodon filter has an issue since astrodon’s are top quality (like chroma) and so you should notice enhanced contrast from the 5nm.



#17 GOLGO13

GOLGO13

    Skylab

  • *****
  • Posts: 4287
  • Joined: 05 Nov 2005
  • Loc: West Virginia

Posted 10 October 2019 - 04:52 PM

Might have to find someone I can send the 5nm to and compare with their filter. Let me know if anyone here would want to do so. And return it of course wink.gif

 

It certainly does provide nebula views, but the 8nm seemed better in almost every way.


Edited by GOLGO13, 10 October 2019 - 04:53 PM.


#18 GOLGO13

GOLGO13

    Skylab

  • *****
  • Posts: 4287
  • Joined: 05 Nov 2005
  • Loc: West Virginia

Posted 10 October 2019 - 09:16 PM

Confirmed that the 8nm is working much better in my setup. And an added plus it works with the .5 reducer (coma is pretty bad though). The 6 inch F4 helps without the extension for that reducer. But the .7 reducer is probably more reasonable.

 

Looking forward to trying the afocal setup.



#19 GeezerGazer

GeezerGazer

    Viking 1

  • *****
  • Posts: 973
  • Joined: 06 Jan 2005
  • Loc: Modesto, CA

Posted 11 October 2019 - 01:25 AM

Nice images Gavin.  They are compelling evidence of what NV can deliver from an urban site; it is a remarkable tool for H-a observing.  

 

The S&T October edition has a great article about 3 amateurs who are creating an H-a collage/map with high resolution images which show the extent of H-a through the MW.  It's a great article for those of us who can see it real-time or who photograph it using NV.  

Ray


Edited by GeezerGazer, 11 October 2019 - 01:26 AM.

  • Gavster likes this

#20 Highburymark

Highburymark

    Lift Off

  • -----
  • Posts: 11
  • Joined: 20 Mar 2019

Posted 11 October 2019 - 06:38 AM

Very nice Gavin - fact that you’ve moved from 130mm aperture with the Epsilon to 85mm with the Tak seems to have made little difference to image quality.
I’m using 3nm Chroma almost exclusively now in London over Baader 7nm. Couldn’t stretch to a 2” Chroma though - so settled on TV plossl 40mm as my main nebulae eyepiece
  • Gavster likes this


CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics







Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics